DNA 50 Electric start trouble?

Hi, we have just bought a dna 50. It kick starts first kick but there are some minor problems with the mechanism which we are fixing. The front pulley with the teeth was loose so the electric start just wirred but did not turn the engine. We have fixed that now, the electric start engages and turns the engine fine but it will not fire. We have charged the battery, cleaned all the mechanism and it still won't fire off the electric start. The battery appears to be in good fettle reading 14.2 volts. starts fine on kick.
Any ideas please

Thanks